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Abstract

Lemna minor is a small aquatic polyploid angiosperm
which reproduces apomictically and has a worldwide distribution.
This study was vmdertaken to characterize the
extent and nature of phenotypic variability.
The techniques of starch gel electrophoresis were
used in this investigation and. MDH phenotypes of several
populations from Ontario, USA and Africa were examined
and compared. Heat stability, molecular weight and
cell fractionation analyses were also done to identify
locus specific MDH bands.
The results of the population surveys suggest that
there is little genetic variability present both within
and between Lemna minor/Lemna turionifera . Evidence of
correlation of physiological and seasonal variation patterns
was found.